Denial of service in NGINX Unit

1) Heap-based buffer overflow

EUVDB-ID: #VU17476

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-7401

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to a boundary error when processing malicious input. A remote attacker can supply a specially crafted request, trigger heap-based buffer overflow and cause the router process to crash.

Mitigation

Update to version 1.7.1.

Vulnerable software versions

Unit: 0.3 - 1.7

External links

http://hg.nginx.org/unit/file/tip/CHANGES
http://mailman.nginx.org/pipermail/unit/2019-February/000113.html
http://unit.nginx.org/CHANGES.txt

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.